Please note that this website has a UK government accesskeys system.
Check how much tax you're paying using the quick check calculator
What to do if you're paying the wrong amount of tax
Understanding and checking your P800 tax calculation and what to do if you think it is wrong
Changes you need to tell HM Revenue & Customs (HMRC) about to make sure you pay the right amount of Income Tax
How to avoid overpaying or underpaying Income Tax, including when you have more than one job